Table 3.
Calculated concentrations of dissolved copper in subsurface inflow to subreaches
of Daisy Creek, Montana, August 26, 1999
[Abbreviations: L/s, liters per second; μg/L, micrograms per liter; μg/s, micrograms per
second]
|
Subreach description1 |
Subreach extent |
|
Subsurface inflow |
|||
|
|
Upstream site |
Downstream site |
|
Flow2 (L/s) |
Dissolved copper load3 (μg/s) |
Calculated dissolved- copper concentration4 (μg/L) |
|
Moraine or landslide hill |
0 |
270 |
|
0.40 |
151 |
755 |
|
Manganese bog |
270 |
460 |
|
.21 |
251 |
2,390 |
|
Southern part of McLaren Mine area |
460 |
611 |
|
.68 |
8,900 |
26,200 |
|
Northern part of McLaren Mine area |
611 |
1,700 |
|
1.63 |
7,040 |
8,640 |
|
Area north and west of McLaren Mine |
1,700 |
5,475 |
|
3.12 |
6,210 |
3,980 |
|
1Describes area from
which metal-rich surface drainage to subreach is derived. 2Calculated from
data in table 5. 3Data from table
2. 4Concentrations
are for right-bank surface inflows.
Assumes that one-half of subsurface inflow came from right side of
Daisy Creek and that subsurface inflow from left side of Daisy Creek
contributes no copper load. |
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